[....] Starting enhanced syslogd: rsyslogd[ 16.176146] audit: type=1400 audit(1520892138.741:5): avc: denied { syslog } for pid=4031 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.509123] audit: type=1400 audit(1520892142.074:6): avc: denied { map } for pid=4170 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. executing program [ 37.659169] audit: type=1400 audit(1520892160.224:7): avc: denied { map } for pid=4187 comm="syzkaller484091" path="/root/syzkaller484091695" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 42.976342] kasan: CONFIG_KASAN_INLINE enabled [ 42.981029] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.988409] general protection fault: 0000 [#1] SMP KASAN [ 42.993917] Dumping ftrace buffer: [ 42.997424] (ftrace buffer empty) [ 43.001102] Modules linked in: [ 43.004270] CPU: 1 PID: 4187 Comm: syzkaller484091 Not tainted 4.16.0-rc5+ #351 [ 43.011684] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.021016] RIP: 0010:kernel_sock_shutdown+0x29/0x70 [ 43.026087] RSP: 0018:ffff8801c694fcc8 EFLAGS: 00010206 [ 43.031418] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff845fe6f4 [ 43.038657] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000028 [ 43.045898] RBP: ffff8801c694fce0 R08: 0000000000000000 R09: 1ffff10038d29f15 [ 43.053134] R10: ffff8801c694f870 R11: 0000000000000001 R12: ffff8801d530c7d2 [ 43.060373] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801c694fd58 [ 43.067613] FS: 0000000001a57880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 43.075807] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.081656] CR2: ffffffffff600400 CR3: 00000001b9260006 CR4: 00000000001606e0 [ 43.088899] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.096138] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.103377] Call Trace: [ 43.105936] smc_shutdown+0x3ed/0x540 [ 43.109710] SyS_shutdown+0x137/0x290 [ 43.113479] ? SyS_getsockopt+0x340/0x340 [ 43.117598] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 43.123104] ? do_syscall_64+0xb7/0x940 [ 43.127047] ? SyS_getsockopt+0x340/0x340 [ 43.131166] do_syscall_64+0x281/0x940 [ 43.135021] ? __do_page_fault+0xc90/0xc90 [ 43.139224] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 43.144738] ? syscall_return_slowpath+0x550/0x550 [ 43.149637] ? syscall_return_slowpath+0x2ac/0x550 [ 43.154540] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 43.159872] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.164689] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 43.169846] RIP: 0033:0x43fcb9 [ 43.173004] RSP: 002b:00007ffce09d2d98 EFLAGS: 00000217 ORIG_RAX: 0000000000000030 [ 43.180680] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcb9 [ 43.187917] RDX: 000000000043fcb9 RSI: 0000000000000000 RDI: 0000000000000003 [ 43.195156] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 43.202395] R10: 00000000004002c8 R11: 0000000000000217 R12: 00000000004015e0 [ 43.209636] R13: 0000000000401670 R14: 0000000000000000 R15: 0000000000000000 [ 43.216886] Code: 66 90 55 48 89 e5 41 55 41 54 53 48 89 fb 41 89 f5 e8 ac 30 11 fd 48 8d 7b 28 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 32 4c 8b 63 28 48 b8 00 00 00 00 00 fc ff df 49 [ 43.235956] RIP: kernel_sock_shutdown+0x29/0x70 RSP: ffff8801c694fcc8 [ 43.242570] ---[ end trace d37b8f96849997b8 ]--- [ 43.247306] Kernel panic - not syncing: Fatal exception [ 43.253032] Dumping ftrace buffer: [ 43.256540] (ftrace buffer empty) [ 43.260221] Kernel Offset: disabled [ 43.263844] Rebooting in 86400 seconds..